Moderator: mikel
No matter if I have the stock tune or Diablo mode 2, 3 once I get close to redline, the trans shifts to the next gear. Reading through the link above, it appears there is a "shift limiter" for the TCM. If that is true, it doesn't appear that you can completely disable auto-upshifts.Lets decribe how the Stock Auto Stick operation is different than the one provided by DiabloSport...
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STOCK (Chrysler) 1-2-3-4-D
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*The car upshifts freely untill it hits the "upper gear limit" set by the auto-stick.
When you go (-) from "D" while doing 30MPH you will enter autostick operation in "4". This does not mean you are IN 4th. It means the car will upshift freely until it gets to 4th and then will not shift into 5th...
In the Chrysler mode the Number represents the gear the car should not automatacally shift past... Not what gear the car is actually in.
If you hit (-) again you will be in 3. If in 3 you stop at a light the indicator will stay at 3. As you take off the car will shift 1>2>3 but not shift to 4th because you set at 3 as the limit.
If you are at 4 and hit (+) you will simply be saying "You can now shift freely 1-5" (which is the same as "D")... So you exit Auto Stick operation and enter into "D" (fully automatic operation).
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NO-UPSHIFT (DiabloSport) 1-2-3-4-5-D
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* The car will not upshift freely. You as a driver have to "Tell" the trans to upshift.
When you go (-) from "D" while doing 30MPH you will enter autostick operation probably in "3". It will enter into the gear the car currently is in at the moment.
If you hit (-) again (and your not going too fast) you will shift to 2nd and the engine will rev up, you WILL be in 2nd.
As you slow down the RPMs will drop and when they get low enough (~1000RPM) the car will downshft on it's own to avioid stalling. So if I were in 3 and I slowed the car to a stop, it will shift 3>2>1 on it's own. And the indicator will walk down with the gear shifts.
As I accelerate from the stop I'm in 1, and the car will NOT UPSHIFT on it's own... It will rev up untill I tell it to shift to 2nd, then 3rd, and so on... *That's what "No-Upshift" means...
*Post Edit1: "No-Upshift is true unless the driver pushes the car to the RPM set in the shift limiter... This would be ~5800RPM stock, or (6000-6500)RPM if adjusted by the the Predator. When the cars RPMs get to the shift limiter setting, the trans will shift up on it's own. But not before that limit. (Thanks to DaveDees and Dom for their proof read and this addition)
Because this behaivor is really the driver choosing what gear the car should be in (within allowable speed windows to maintain RPM), 5th becomes a valid choice in the autostick selection domain, and the car will provide you with 5 as a choice before hitting (+) and exiting autostick operation and going back to "D" (Fully Automatic shifting)